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Product Resources

Performance. The Synergy 2-door 4.0"/ 4-door 3.0" Rear Lift Springs are designed to improve the quality and comfort of your vehicle's off road performance. They are progressively wound to prevent annoying clanking noise and also keep the springs from coming apart at suspension droop. You'll find these springs will allow you to run 37 inch tires on your 2 door JK and 35 inch tires on 4 door applications.

Construction. These rear lift springs are abrasive resistant and have black powder-coated finish to offer durability and also prevent damage due to corrosion. These rear lift springs are full frequency balanced and feature tuned spring rates for the most in performance and reliability.

Had 3” spacers on top of stock springs until I could afford new ones.
WOW !! What a difference!!
Even my Wife was impressed !
No more Top Heavy feel while cornering, and a much smoother ride, On and Off the pavement.

I bought the Synergy 3 inch rear lift springs for my JKU to get back the rake I lost from my original lift (different manufacturer). Synergy coils are designed to maintain the factory rake of the vehicle, which I like. No longer does my Jeep squat when loaded up for a trip.
I also noticed that on road ride quality also improved over my last set of springs. Small bumps like cracks in the road are absorbed more gracefully and with less of a shudder from the Jeep. Washboard roads are also more comfortable now. There must be something to the dual rate hype because I've noticed absolutely no performance compromises off road.
I gave these springs 4/5 for value because there are so many other springs out there for the same price. I do think these are among the best coils out there, though.
I also gave a 4/5 for appearance because almost all coils are powdercoated black. I'll admit that I prefer the silver/grey of my old springs. However, the finish on these seems to be high quality and has held up very well to the past several months of snow, ice, salt, dirt, mud, and water.
If you're looking for a comfortable rear coil that actually provides the same lift front and rear, I'd highly recommend these.

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Extended Warranty. ExtremeTerrain/Turn5 Inc. is proud to offer an optional 12 month extended limited warranty to our customers that purchase an eligible product. The program administrator will replace or refund the cost of the covered part of a period of 12 months after the manufacturers warranty elapses, or from the date of purchase if the manufacturer does not offer a warranty.

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Word On The Trail

Meet Our Team

Dave D, 2007 Jeep Wrangler JKUMerchandisingI have owned YJ’s and TJ’s in the past. After not owning one for several years I got the bug again and decided to go buy one. On a whim I saw this one and went to the dealership on the same day while my wife was at work and came home with it. She was a little bit surprised (mad) to see the Jeep in t...